1 files changed, 6 insertions, 1 deletions
diff --git a/tvix/eval/src/tests/one_offs.rs b/tvix/eval/src/tests/one_offs.rs
index 63bb8f7af378..13b87267a987 100644
--- a/tvix/eval/src/tests/one_offs.rs
+++ b/tvix/eval/src/tests/one_offs.rs
@@ -15,5 +15,10 @@ fn test_source_builtin() {
         result.errors
     );
 
-    assert!(matches!(result.value.unwrap(), Value::Integer(42)));
+    let value = result.value.unwrap();
+    assert!(
+        matches!(value, Value::Integer(42)),
+        "expected the integer 42, but got {}",
+        value,
+    );
 }